Beating engine and the like



A. s. STEWART 2,455,622

BEATING ENGINE AND THE LIKE Filed June 4, 1945 Patented Dec. 7, 1948 BEATING ENGINE AND THE LIKE Andrew George Stewart, Edinburgh, Scotland Application June 4, 1945. Serial No. 597,563 In Great Britain June 17, 1944 Section 1, Public Law mama s, 1946 Patent expires June 17, 1964 4 Claims.

This invention relates to beating engines and the like such as potching engines, washing engines or breaking engines asvused in the manufacture of paper and paper pulp. The invention is particularly applicable to beating engines of the kind described in patent specification 1,662,466 although it is not limited to that application.

In these machines it is on occasions necessary to wash them out with water, whilst on other occasions it is desired to add water, chemicals, colour, etc., to the contents of the engine and the object of the present invention is an improved method of and means for facilitating any such operation.

The invention comprises the method of adding water, colour, chemicals or other material to the beater roll adjacent to and preferably after the doctor therefor.

According to the invention in beating and like engines having a rotatable roll over which is arranged a cover embodying a cylindrical part over the roll and an adjoined delivery-receiving hood part, such parts being joined in V formation over the rising surface of the roll, means are provided for the admission of liquid to the roll comprising an aperture in the said V formation of the cover.

The accompanying drawing is a sectional side elevation of a cover made in accordance with one example of the invention for a beating engine for paper-making.

In the example of the invention as shown in the drawing the improved cover comprises a cylindrical part a to fit over the roll and an adlolned delivery-receiving hood part b. Such two parts are adjoined in V formation the apex c of which constitutes a doctor to prevent pulp travelling round with the roll (1 part of which is shown in chain line. At the V formation aforesaid, a liquid holding trough is formed by means of side plates e whilst in the cylindrical part a there is formed an inclined overflow weir f projecting into the trough and the top of such part a, over the said weir is constructed as a hood 9 forming an aperture g extending the length of the roll. Supported over the trough is a filter gauze h.

In operation, to wash out the beating engine, the normal outlet valve, not shown, is open, to drain the pulp trough and then water is supplied to the trough through the gauze h. Water overflows down the weir f on to the roll, most of the water being carried round with the roll and thrown over the backfall whilst some may fall towards the backfall shown at i and is thrown up as it meets the other which is carried round and thrown up by the roll.

When the pulp is emptied from the back channel and trough'of the engine, the water therein takes the easiest path to the outlet valve which is down the breast of the engine, that is, the sloping part of the trough where it rises up to the bed plates and the roll. Even in the best designed engines, there is, therefore, generally a lodgment of pulp on this sloping portion of the trough which in existing engines must be hosed down to the outlet valve or removed manually by means of a stirring stick or paddle. The present invention, however, enables t e machine to be effectively washed for the removel of any pulp in such location as well as any which has adhered to the inside of the cover and to the roll, leaving both perfectly clean and using a minimum quantity of water.

The invention provides the following main advantages:

(1) Complete emptying of the engine using less water than is required by the present methods, special attention being paid to the fact that he breast of the engine is washed perfectly clean.

(2) The inside of the beater cover and the roll are also washed perfectly clean.

(3) The water is added at the correct part of the engine so that the pulp is diluted from the 1 backfall and not from the breast of the engine as is usual.

WhatI claim is:

1. A beating enginecomprising in combination, a roll rotatable on a horizontal axis in a certain direction to have an upwardly risingside and a downwardly descending side, a cover construction having a central horizontal portion disposed above the rising side of said roll and a, portion extending therefrom around the descending side of the roll, an inner wall member at the rising side of the roll and spaced therefrom having lower and upper edges and extending upwardly from said lower to upper edge substantially parallel to an adjacent peripheral portion of the roll and said upper edge terminating below the plane of said horizontal portion of the cover, an outer wall member having a lower edge secured to the lower edge of the inner wall member and extending upwardly and away therefrom in diverging relation and forming therewith a substantial V, and plates secured to opposite ends of said wall members forming therewith a V-shaped trough open at its upper side below the horizontal portion of the cover, the lower secured together edges of said wall members forming a doctor and the upper edge of said inner wall member providing a weir.

2. A beating engine comprising in combination, a roll rotatable on a horizontal axisin a certain direction to have an upwardly rising side and a downwardly descending side, a cover construction having a central horizontal portion disposed above the rising side of said roll and a portion extending therefrom around the descending side of the roll, an inner wall member at the rising side of the roll and spaced therefrom having lower and upper edges and extending upwardly from said lower to upper edge substantially parallel to an adjacent peripheral portion of the roll and said upper edge terminating below the plane of said horizontal portion of the cover, an outer wall member having a lower edge secured to the lower edge of said inner wall member and extending upwardly away therefrom in diverging relation forming a V therewith and then over at a point substantially on a plane parallel to that of the horizontal portion of the cover and then outwardly and downwardly, end plates secured to opposite ends of adjacent portions of said inner and outer walls forming therewith a V-shaped trough open at its upper side below the horizontal portion of the cover, the lower secured together edges of said wall members forming a doctor and the upper edge of said inner wall providing a weir portion.

3. A beating engine comprising in combination, a roll rotatable on a horizontal axis in a certain direction to have an upwardly rising side and a downwardly descending side, a cover construction having a central horizontal portion disposed above the rising side of said roll and a portion extending therefrom around the descending side of the roll, an inner wall member at the rising side of the roll and spaced therefrom having lower and upper edges and extending upwardly from said lower to upper edge substantially parallel to an adjacent peripheral portion of the roll and said upper edge terminating below the plane of said horizontal portion of the cover, an outer wall member having a lower edge secured to the lower edge of said inner wall member and extending upwardly away therefrom in diverging relation forming a V therewith and then over at a point substantially on a plane parallel to that of the horizontal portion of the cover and then outwardly and downwardly, end plates secured to opposite ends of adjacent portions of said inner and outer walls forming therewith a V-shaped trough open at its upper side below the horizontal portion of the cover, the lower secured together edges of said wall members forming a doctor and the upper edge of said inner wall providing a weir portion, the upper weir providing edge of the inner wall extending inwardly of said trough and away from said roll, and a longitudinal member extending downwardly from said cover towards said weir and spaced therefrom and forming therewith a continuous slot for the passage of liquid from said trough onto said roll.

4. A beating engine comprising in combination, a, roll rotatable on a horizontal axis in a certain direction to have an upwardly rising side and a downwardly descending side, a cover construction having a central horizontal portion disposed above the rising side of said roll and a portion extending therefrom around the descending side of the roll, an inner wall member at the rising side of the roll and spaced therefrom having lower and upper edges and extending upwardly from said lower to upper edge substantially parallel to an adjacent peripheral portion of the roll and said upper edge terminating below the plane of said horizontal portion of the cover, an outer wall member having a lower edge secured to the lower edge of said inner wall member and extending upwardly away therefrom in diverging relation forming a V therewith and then over at -a point substantially on a plane parallel to that of the horizontal portion of the cover and then outwardly and downwardly, end plates secured to opposite ends of adjacent portions of said inner and outer walls forming therewith a V-shaped trough open at its upper side below the horizontal portion of the cover, the lower secured together edges of said wall members forming a doctor and the upper edge of said inner wall providing a weir portion, the upper weir providing edge of the inner wall extending inwardly of said trough and away from said roll, and a longitudinal member extending downwardly from said cover towards said weir and spaced therefrom and forming therewith a continuous slot for the passage of liquid from said trough onto said roll, and a filter in said cover over said trough.

ANDREW GEORGE STEWART.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,595,209 Mitchell Aug. 10, 1926 2,000,268 Witham May 7, 1935 2,214,080 Kelly Sept. 10, 1940 FOREIGN PATENTS Number Country Date 355,635 Great Britain Aug. 27, 1931 479,030 Great Britain Jan. 28, 1938 273,925 Germany May 7, 1914 

